linux man page for install_joystick

install_joystick(3alleg4)					  Allegro manual					 install_joystick(3alleg4)

NAME

       install_joystick - Initialises the joystick. Allegro game programming library.

SYNOPSIS

       #include <allegro.h>

       int install_joystick(int type);

DESCRIPTION

       Installs  Allegro's  joystick handler, and calibrates the centre position values. The type parameter should usually be JOY_TYPE_AUTODETECT,
       or see the platform specific documentation for a list of the available drivers.	You must call this routine before using any other joystick
       functions, and you should make sure that all joysticks are in the middle position at the time. Example:

	  textout_centre_ex(screen, font,
			    "Center the joystick and press a key",
			    SCREEN_W/2, SCREEN_H/2, red_color, -1);
	  readkey();
	  if (install_joystick(JOY_TYPE_AUTODETECT) != 0)
	     abort_on_error("Error initialising joystick!");

RETURN VALUE

       Returns	zero  on success. As soon as you have installed the joystick module, you will be able to read the button state and digital (on/off
       toggle) direction information, which may be enough for some games. If you want to get full analogue input, though, you need to use the cal-
       ibrate_joystick() functions to measure the exact range of the inputs: see below.

SEE ALSO

       remove_joystick(3alleg4),      num_joysticks(3alleg4),	  load_joystick_data(3alleg4),	   calibrate_joystick(3alleg4),     calibrate_joy-
       stick_name(3alleg4), poll_joystick(3alleg4), exjoy(3alleg4)

Allegro 							   version 4.4.2					 install_joystick(3alleg4)